Compare Sigma 50mm F1.4 DG HSM vs Sigma 20mm F1.4 DG HSM vs Tokina Firin 20mm F2 AF
Construction
Aperture Blades
9 blades, Rounded diaphragm
9 blades, Rounded blades
9 blades
Colors
Black
Black
Form Factor
Normal Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Distance scale, DoF scale
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Sigma SA-mount, Sony A-mount, Sony E-mount, Leica L-mount
Canon EF-mount, Nikon F-mount, Sigma SA-mount, Sony E-mount, Leica L-mount
Sony E-mount
Motor
Ring-type ultrasonic
Ring-type ultrasonic
Ring-type ultrasonic
Optical Formula | Elements
13 elements
15 elements
13 elements
Optical Formula | Groups
8 groups
11 groups
11 groups
Optical Formula | Special Glass
SLD glass elements, aspheric elements groups
Two FLD, five SLD elements + Super Multi-Layer coating groups
3 super-low-dispersion + 2 ED elements groups
Dimensions
Filter Diameter
77 mm / 3.03 in
62 mm / 2.44 in
Size | Diameter
85 mm / 3.35 in
91 mm / 3.58 in
73 mm / 2.87 in
Size | Length
100 mm / 3.94 in
130 mm / 5.12 in
82 mm / 3.23 in
Weight
815 g / 28.80 oz
950 g / 33.57 oz
464 g / 16.40 oz
Function
Angle Of View
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
Aperture
f/1.4 ~ f/16
f/1.4 ~ f/16
f/2 ~ f/22
Autofocus
Yes
Yes
Focal Length
50 mm
20 mm
20 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.18x
0.14x
0.1x
Min Focus Distance
400 mm / 15.75 in
300 mm / 11.81 in
280 mm / 11.02 in
Production
Accessory
Lens hood included
Lens Hood: BH-623 (supplied)
Debut
2014-01-06
2015-10-16
2018-02-22
Made In
Japan
Japan
Reviews
Neofiliac score
74%
55%
59%
Pros
- Exceptional sharpness
- Solid build quality
- Bright maximum aperture
- High level of resolution
- Bright maximum aperture
- The best image quality from Tokina
- Quite light
Cons
- On the heavy side
- Large and heavy
- Lacks front filter thread
- Lacks weather sealing
- Lacks weather sealing
- Lacks extra features
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